From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by dpdk.org (Postfix) with ESMTP id DC5E8D018 for ; Fri, 20 Apr 2018 17:25:32 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 20 Apr 2018 08:25:30 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.49,302,1520924400"; d="scan'208";a="48567342" Received: from irvmail001.ir.intel.com ([163.33.26.43]) by fmsmga001.fm.intel.com with ESMTP; 20 Apr 2018 08:25:29 -0700 Received: from sivswdev01.ir.intel.com (sivswdev01.ir.intel.com [10.237.217.45]) by irvmail001.ir.intel.com (8.14.3/8.13.6/MailSET/Hub) with ESMTP id w3KFPSMT025882 for ; Fri, 20 Apr 2018 16:25:28 +0100 Received: from sivswdev01.ir.intel.com (localhost [127.0.0.1]) by sivswdev01.ir.intel.com with ESMTP id w3KFPSLi001094 for ; Fri, 20 Apr 2018 16:25:28 +0100 Received: (from aburakov@localhost) by sivswdev01.ir.intel.com with LOCAL id w3KFPSqb001090 for dev@dpdk.org; Fri, 20 Apr 2018 16:25:28 +0100 From: Anatoly Burakov To: dev@dpdk.org Date: Fri, 20 Apr 2018 16:25:27 +0100 Message-Id: <79dd25146593211c90a12bb7e0538e1c5ff80ca7.1524237907.git.anatoly.burakov@intel.com> X-Mailer: git-send-email 1.7.0.7 In-Reply-To: References: In-Reply-To: References: Subject: [dpdk-dev] [PATCH v2 3/3] mem: improve autodetection of hugepage counts on 32-bit X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 20 Apr 2018 15:25:33 -0000 For non-legacy mode, we are preallocating space for hugepages, so we know in advance which pages we will be able to allocate, and which we won't. However, the init procedure was using hugepage counts gathered from sysfs and paid no attention to hugepage sizes that were actually available for reservation, and failed on attempts to reserve unavailable pages. Fix this by limiting total page counts by number of pages actually preallocated. Signed-off-by: Anatoly Burakov --- lib/librte_eal/linuxapp/eal/eal_memory.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c b/lib/librte_eal/linuxapp/eal/eal_memory.c index fadc1de..6f2cdf8 100644 --- a/lib/librte_eal/linuxapp/eal/eal_memory.c +++ b/lib/librte_eal/linuxapp/eal/eal_memory.c @@ -1603,6 +1603,18 @@ eal_legacy_hugepage_init(void) return -1; } +static int __rte_unused +hugepage_count_walk(const struct rte_memseg_list *msl, void *arg) +{ + struct hugepage_info *hpi = arg; + + if (msl->page_sz != hpi->hugepage_sz) + return 0; + + hpi->num_pages[msl->socket_id] += msl->memseg_arr.len; + return 0; +} + static int eal_hugepage_init(void) { @@ -1617,10 +1629,29 @@ eal_hugepage_init(void) for (hp_sz_idx = 0; hp_sz_idx < (int) internal_config.num_hugepage_sizes; hp_sz_idx++) { +#ifndef RTE_ARCH_64 + struct hugepage_info dummy; + unsigned int i; +#endif /* also initialize used_hp hugepage sizes in used_hp */ struct hugepage_info *hpi; hpi = &internal_config.hugepage_info[hp_sz_idx]; used_hp[hp_sz_idx].hugepage_sz = hpi->hugepage_sz; + +#ifndef RTE_ARCH_64 + /* for 32-bit, limit number of pages on socket to whatever we've + * preallocated, as we cannot allocate more. + */ + memset(&dummy, 0, sizeof(dummy)); + dummy.hugepage_sz = hpi->hugepage_sz; + if (rte_memseg_list_walk(hugepage_count_walk, &dummy) < 0) + return -1; + + for (i = 0; i < RTE_DIM(dummy.num_pages); i++) { + hpi->num_pages[i] = RTE_MIN(hpi->num_pages[i], + dummy.num_pages[i]); + } +#endif } /* make a copy of socket_mem, needed for balanced allocation. */ -- 2.7.4